A 17-year-old North Carolina girl who recorded a livestream of a shooting that killed three people at a San Diego mosque and then disseminated the attackers’ white-supremacist writings has been charged with murder by aiding and abetting, a district attorney said Monday. Forsyth County District Attorney Jim O’Neill said at a news conference in Winston-Salem that the girl, identified in court records as Sarah L. Santiago, was arrested last week. A grand jury indicted her on three counts of murder and one count of conspiracy Monday. “At this time I can confirm that my client is innocent of all these...